Fuel controls for gas turbine engines

Patent · Tue Jan 05 00:00:00 EST 1988

OSTI ID:5392086

Ralston, R B; McLevige, D J

In a system for controlling the rate of fuel fed to the burners of a gas turbine engine, the combination is described comprising (a) a positive displacement pump driven by the engine and supplying fuel from a source to a main conduit, (b) a main valve disposed between the main conduit and the burners of the engine, (c) a variable opening area bypass valve connected between the main conduit and the source to return fuel to the latter, (d) hydraulic actuator means responsive to the admission of pressurized fluid, or the venting of fluid, for respectively closing and opening the bypass valve, (e) a first valve having a controlled port connected to the hydraulic actuator means (d) to provide a path for the admission of pressure fluid through an input line or the venting of fluid, (f) a second valve having a controlled port to supply pressure fluid to or vent fluid from the input line of the first valve, (g) means for causing the first valve (i) to connect its controlled port to the input line when the pressure drop ..delta..P across the main valve is less than a set point value ..delta..P/sub d/ and (ii) to connect its controlled port to a low pressure sump when the pressure drop ..delta..P is greater than the set point ..delta..P/sub d/ and (h) means for causing the second valve (i) to connect its controlled port to a fluid pressure source when the engine speed N is less than a set point value N/sub os/, and (ii) to connect its controlled port to a low pressure sump when the speed N is greater than the set point N/sub os/.

• Assignee: Woodward Governor Co., Rockford, IL
• Patent Number(s): US 4716723
• OSTI ID: 5392086
• Resource Relation: Patent File Date: Filed date 5 Sep 1986
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
FUEL INJECTION SYSTEMS
DESIGN
FLOW RATE
GAS TURBINE ENGINES
ACTUATORS
BURNERS
COMPRESSIBLE FLOW
PUMPS
VALVES
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
330103* - Internal Combustion Engines- Turbine